Improvement in steam-generator smoke-stacks



iinited gisten @sind imite.

BEEGHER, 0F MORRISTOWN, NEW'YORK.

u Letters Patent No. 97,473, dated December 7, 1869; antedatell. November 24, 1869.

IMPRovriMBNT 1N STEAM-GENERATOR sMoKE-sTAcxsl vThe Schedule referred t9 in these Letters Patent and making part of the same. l

To all 'whom it may concern Y Beit known that I, W, F. BEECHnR, of Morristown, in the' county of St. Lawrence, and State of New York,

have invented a new and improved Smoke-Stack; and

I do hereby declare that the following is a full, clear,

and exact description thereof, reference being had to.

ments on smoke-stacks for portable and stationary boilers and for, marine boilers, which improvements 4 are designed for preventing the escape of sparks from a stack without the use of wire gauzeyalso, for concentrating and retaining a large amount of heat in the smoke-box; and, also, for causing the arrested sparks, cinders, and .soot to fall freely into the smokebox beneath the stack.

Provision is also made for regulating the draught, and for obtaining either a direct or an indirect draught at pleasure, as will be hereinafter explained. i

To enableothers skilled in the art to understand my invention, I will describe its construction and operation. y

vIn lthe accompanying drawings, I have represented my improved stack arrauged'npon locomotive-boiler; but itwill be seen from the following description that the stack is applicable to steam-generators of various descriptions.

A represents the discharge-pipe, which is secured, at a point above it's lower end, to a crown, B, made of the forni of the frustumof a cone, and flaring downwardly. i

The circumferential .edge of th'is crown rests upon and is secured to'the upper end of an upwardly-fiaring annular wall, D, which is secured, at its lower contracted end or neck., to an annular saddle, F, which is bolted to the shell H over the sinoke-boxat the end of .the boiler.

The three parts, A, B, and D, constitute the outer walls of the stack or chimney, and are made of boilermetal iu the usual well-known manner.

At the base of the cone B is au annular diaphragm, (l, which inclines downwardly toward pipe A from it's point of connection with the upper end of the outer wall D, and is united 'to this pipe A at a point above.

the lower end thereof, as shown in tig. 1.

By this arrangement, there is formed around the lower end of pipe A, and beneath the diaphragm C, a` space for the reverberation of the sparks arid gases, which are deflected downwardly, but arrested for a time in said chamber or space before entering thc lower end of pipe A.

Within the outer wall l) is an invert-ed funnel-shaped wall, E, which is held in place by supports b b, and constructed of such diameter, relatively to the outer shell, as to leave an annular upwardly-flaring space, a, between it on this outer shell.

` The upper end ofthe inner shell extends above the lower end of the pipe A, and the innerend extends l nearly to the base of the saddle F, and terminates in a cylindrical portion enclosing two valves or dampers.

The spacca is open at top and Vbottom for thefree ascent ofthe products of'combustion through it when the dempers at the base o i' the inner wall E are shut.

The exhaust-steam pipe G rises from the smokebox, and its discharge-end enters the space enclosed by the wall E, terminating at a point ,inst above the `dempers above referred to.

This pipe'G coincides with the centre of `the pipe A, and directs the exhaust steam upwardly through this pipe A.

The damper-s J aretwo' semicircular plates, fitted in a suitable manner within thc'cylindrical base of the inner wall E, and hung by' means of rods g g, so as to vibrate freely. v

rlhe ends of these rods extend outside ofthe outer shell of the stack, and have loaded arms,-jj, applied.

at right angles to them, for holding the damper-s open or shut. y

The semicircular notches made in the straight edges of the dampers, allow them to shut around pipe G.

I have new described the construction of my im-y proved spark-arresting and heat-retaining stack,

adapted for locomotive-boilers.

For marine boilers, the shell D and wall E may bei made of two cylinders, terminating in conical ends. When the .dempers J J` are open, the smoke will pass directly off through the inner wall E and pipe A, assisted by every 'pulsation ot' exhaust steam through pipe G. i Y

When the dempers are both shut, the products will take the course indicated by the arrows in fig. 1.

The products pass up through the space a and iinpinge against the diaphragm C, which is so arranged as to retard them long enough to deprive them 'ot' a large amount oi' heat, which will be retained within the stack. l

The products then descend to the lower end of the discharge-pipe A, and rise through this pipe, where they are subjected to the action-of exhaust ,steam issuing from pipe G.

The extinguished particles fall partly through the passage a and partly upon the dampers J, and are discharged below into the smoke-box; consequently the ventilatng-passages cannot become clogged with cin* ders or soot. v

By having the exhaust-pipe carried above the darper, and leaving no obstruct-ion to the ascent of the exhaust steam above this pipe, I insure sufficient draught when the dampers are shut, by expelling the air from pipe A, and thus creating a partial vacuum back to the fire-box.

This arrangement also causes a powerful draught through the grate, and produces lively combustion.

Having described my invention,

What I claim as new, and desire to secure by Let ters Patent, is-

.inner wall E, substantially as described.

W. F. BEEOHER.

Witnesses:

HENRY HOOKER, WILLIAM STEVENSON. 

